x86/fixup_irq: Use cpu_online_mask instead of cpu_all_mask

When one CPU is going down and this CPU is the last one in irq
affinity, current code is setting cpu_all_mask as the new
affinity for that irq.

But for some systems (such as in Medfield Android mobile) the
firmware sends the interrupt to each CPU in the irq affinity
mask, averaged, and cpu_all_mask includes all potential CPUs,
i.e. offline ones as well.

So replace cpu_all_mask with cpu_online_mask.

Signed-off-by: liu chuansheng <chuansheng.liu@intel.com>
Acked-by: Yanmin Zhang <yanmin_zhang@linux.intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/27240C0AC20F114CBF8149A2696CBE4A137286@SHSMSX101.ccr.corp.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 7ad683d78645c1b8eed3a816e6fca23de94541f3..d44f7829968e801cf6b32d41be0c5f297971900d 100644 (file)
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -270,7 +270,7 @@ void fixup_irqs(void)
 
                if (cpumask_any_and(affinity, cpu_online_mask) >= nr_cpu_ids) {
                        break_affinity = 1;
-                       affinity = cpu_all_mask;
+                       affinity = cpu_online_mask;
                }
 
                chip = irq_data_get_irq_chip(data);